On Mon, 27 Nov 2017 20:45:59 -0800
Philip Langdale <phil...@overt.org> wrote:

> We have a number of hardware backed implementations in the codebase
> that are done as full decoders instead of HWAccels for various
> reasons. These decoders cannot be discovered today, and clients
> which care end up needing to hardcode their names. It would be
> helpful to provide a discovery mechanism.
> 
> Philip Langdale (2):
>   avcodec: Add metadata to identify hardware backed codecs
>   avcodec: Add hardware metadata to hardware backed decoders
> 
>  Changelog                  |  1 +
>  doc/APIchanges             |  5 +++++
>  libavcodec/avcodec.h       | 19 +++++++++++++++++++
>  libavcodec/crystalhd.c     |  4 +++-
>  libavcodec/cuviddec.c      |  4 +++-
>  libavcodec/mediacodecdec.c | 24 ++++++++++++++++++------
>  libavcodec/mmaldec.c       |  3 ++-
>  libavcodec/qsvdec_h2645.c  |  8 ++++++--
>  libavcodec/qsvdec_other.c  | 12 +++++++++---
>  libavcodec/v4l2_m2m_dec.c  |  2 ++
>  10 files changed, 68 insertions(+), 14 deletions(-)
> 

Sent a similar patch to Libav:
https://lists.libav.org/pipermail/libav-devel/2017-December/085505.html
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